Yield and quality of potato crop as affected by the application rate of potassium and compost in sandy soil [electronic resources].

Includes reference.

During 2004 and 2005 seasons, this study tested the effects of different rates of potassium and organic manure (compost) on the yield and quality of potato. Compost was used as organic manure at 5 and 10 ton/ fed., whereas, potassium was applied in the form of potassium sulfate (52% k20) at five rates, i.e, 0,40,80,120 and 160 kg k20 per fed. The results showed that the increasing K rate increased fresh and dry weight of haulm of potato plant. Plants received the highest K rate recorded the highest number of tuber per m ,tuber weight and yield compared with plants treated with low K rate. The highest tuber yield was obtained with application of 160 kg K20/fed.. Dry matter accumulation, and starch increased significantly with increasing levels of potassium levels. Applying compost at 10 ton per fed. increased both vegetative growth and yield of potato crop. In addition, the interaction between k and compost caused increasing in vegetative growth, yield and improving in quality of potato tuber. Plants applied with 160 kg K20 / fed. combined with 10 ton compost /fed. produced the highest yield with best quality.

Summary in Arabic.

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